Method for manufacturing secondary battery

Abstract

To provide a method for manufacturing a secondary battery in which an internal short circuit due to a dendrite is inhibited. In a method for manufacturing a secondary battery, a separator is coated with slurry including carbon, a solvent, and a binder, a carbon layer including the binder is formed by drying the slurry to remove the solvent; and pressing is performed on the carbon layer and a negative electrode that face each other. Heating is preferably performed in the pressing.

What is claimed is: 
     
         1 . A method for manufacturing a secondary battery, the method comprising:
 coating a separator with slurry comprising carbon and a solvent;   forming a carbon layer by drying the slurry to remove the solvent; and   performing pressing on the carbon layer and a negative electrode that face each other.   
     
     
         2 . The method for manufacturing a secondary battery according to  claim 1 ,
 wherein the slurry further comprises a binder, and   wherein the carbon layer includes the binder.   
     
     
         3 . The method for manufacturing a secondary battery according to  claim 1 ,
 wherein the slurry further comprises polyglutamic acid, and   wherein the carbon layer includes the polyglutamic acid.   
     
     
         4 . The method for manufacturing a secondary battery according to  claim 1 , wherein the solvent comprises water. 
     
     
         5 . The method for manufacturing a secondary battery according to  claim 1 , wherein heating is performed in the pressing. 
     
     
         6 . The method for manufacturing a secondary battery according to  claim 1 , wherein linear pressure application is performed in the pressing. 
     
     
         7 . A method for manufacturing a secondary battery, the method comprising:
 coating a separator with slurry comprising carbon and a solvent;   forming a carbon layer by drying the slurry to remove the solvent;   performing first pressing on the carbon layer and a negative electrode that face each other; and   performing second pressing on the separator and a positive electrode that face each other.   
     
     
         8 . The method for manufacturing a secondary battery according to  claim 7 ,
 wherein the slurry further comprises a binder, and   wherein the carbon layer includes the binder.   
     
     
         9 . The method for manufacturing a secondary battery according to  claim 7 ,
 wherein the slurry further comprises polyglutamic acid, and   wherein the carbon layer includes the polyglutamic acid.   
     
     
         10 . The method for manufacturing a secondary battery according to  claim 7 , wherein the solvent comprises water. 
     
     
         11 . The method for manufacturing a secondary battery according to  claim 7 , wherein heating is performed in the first pressing or the second pressing. 
     
     
         12 . The method for manufacturing a secondary battery according to  claim 7 , wherein linear pressure application is performed in the first pressing and area pressure application is performed in the second pressing. 
     
     
         13 . The method for manufacturing a secondary battery according to  claim 7 , wherein the second pressing is performed after the positive electrode is cut.